Your accounts are only as safe as the way you protect them. These lessons explain logins, strong passwords, password managers, passkeys, and multi-factor authentication (MFA), and why each one matters. Simple, practical steps anyone can use to keep their accounts secure.
How Passwords Work
A secret code that helps websites know it is really you.
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What Is Login?
How a website checks it is really you before letting you in.
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🧪 Interactive
What Makes a Strong Password?
What makes a password tough for anyone to guess.
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What Is a Password Manager?
An app that creates and remembers strong passwords for you.
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🧪 Interactive
What Is MFA / 2FA?
Adding a second key so a password alone is not enough.
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What Is an Authenticator App?
A special app that shows secret codes to help prove it's really you.
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What Is a Passkey?
A safer way to sign in without remembering a password.
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Authentication vs. Authorization
Proving who you are vs. what you're allowed to do.
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What Is Account Recovery?
How you regain access to your account when you can't sign in.
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What Is a Default Password?
The starter password a device comes with, and why you should change it.
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What's the Difference Between a Password, a Passcode, and a Passkey?
A password is a secret you type, a passcode is a short number that unlocks a device, and a passkey is a newer sign-in that uses your device instead of a remembered secret.
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How Do Usernames Work?
A username is the unique name you pick to use an account, like a nickname for the internet.
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